Alternating-current relay.



MTERNAHNG CURREN? RELAY.

APPLICATION HLED JAIL ENVENTQR UNITED STATES PATENT OFFICE.

OSCAR s. rmrinlor NEW YORK, N. Y., nssrenon' T0 HALL SWITCH & SIGNAL 00., A CORPORATION or MAINE.

ALTEBNATING-CURRENT RELAY.

Specification of Letters Patent.

Patented July 16, 1918 Applicatidn filed Januar s, 1917. Serial No. 140,439.

To all whom it may concern:-

Be it known that'I, OSCAR S. F IELD, a subject of the King of Great Britain, and a resident of the cit of New York, county of New York, and i fate of New York, have invented. certain new and useful Improvements in Alternating-.Current Relays, of which the following is a specification.

This invention relates to certain improved means of construction of alternating current relays, applying more specifically to that type which is known as the two phase induction motor relay and which employs a hollow non-magnetic cup rotor in its operation.

One objectof this invention is to provide a relay of the above type which will have its contacts and contact fingers fully exposed and easy ofaccess and inspection without; inferfering with the operating parts of the re a Aiiothercbject of the. invention is to provide a novel construction and arrangement of parts which will allow inspection ofthe operating parts at all times.

Furious other. objects and novel features will be more specifically described in the accompanying description and claimed in the appended claims.

Referring to drawings, in Figure 1 1 show a transverse section through the relay.

Fig. 2 is a front elevation of the same.

Fig. 3 is an elevation with the front part of the relay'rernoved, showing the windings and cup rotor.

Fig. 4 is a back elevation of the front part of the relay showing the operating pinion and gear segment.

, Referrin r to Fig. 1, I show a front member 1 to which is attached a cased having an internal an ular support 3 formed therein, upon which is mounted a soft iron laminated ring shaped core 4;. About the core 4-. is a multipolar laminated field structure 5 whicln is provided with operating windings Sand 7 s0 angularly disposed that when they are er.- ergized by means of two phase alternating current it will create a moving flux field between the pole pieces 8 and the core 41 in the undue torque being placed-upon the cup.

On the front end of the shaft 10 a pinion 17 is rigidly inountei'l, and gear segment 18 mounted to swing on a spindle l9 meshes with the pinion 17, being counterweighted at 59 so that it will normally assume the position shown in Fig. with the projection 20 resting against the inside wall 21 of member 1.

Gear segment 18 is provided with a crank pin 22 so arranged that upon the movement of gear segment 18 by means. of rotation of pinion 17 acting against the counterweight 59 which is carried by extension 29 rigidly attached to gear-segment 18, the connecting. link 23 will be forced downward.- The link- .23 is connected by means of apin 24 to a l? lever arm which operates about a center? 80 26 and attached to the lever arm 25 is the contact linger carrying bar 97 made of insulating material, on the underside of which are mounted contact fingers 28. l

The front inenzher l is provided with an opening 29 in which an insulating panel 30 is mom'ated- Thispanel is providedwith a series of front contacts and binding posts 31 and back contacts and binding posts 62, with which the contact fingers 28 are adapted to co-act. The panel also carries a series of binding posts 33 from which flexible leads 3% pass to the contact fingers 28.

In a recess 35 on the undersideof memher 1 is a gasket 36, and a cover 48 made of glass or other transparent material, adapted to incase the contacts 31"8116'32 and the co-acting contact lingers 28 being clamped against the gasket 36 by means of rod 3? and clamping nut 38. The front member 1 is also provided with an opening 39 in the front partthereof,'a.bove the in? sulating' panel 30, this 0 ening being closed by means of a cover g ass 40. retained .in

place by means of clainpln ring 41 thereby allowing free inspection gthe mechanism at all times.

Front member 1- is-- rovided with exten'- sion 42 which forms front supports for-the relay, the/beck case 2 being supp d w th 11 an extension 43 which acts as the back sup;

port. Backcasef2'is further supplied with, lugs' 4:4 in'order that the relay maybe hung.

are mounted in suitable insulating inserts 47, which further act to' retain the field laminations5 in place.

Referring to the various drawings,- the operation of the relay is as follows': i

- The winding 6 is continuously energized from atransformer or other suitable source of a given frequency.

IVinding 7 is energized from a controlled source of alternating current of the-same frequency as the energy in winding 6 but;

angularly displaced as to phase, which will thereby, when winding 'Z is energized, create,

a rotating flux field which will act upon the cup rotor 9 to cause the rotation of the same.

The. cup rotor willrotate the spindle 1O -and its pinion 17 which engages with gear segment 18, and will thereby force gear segment 18 over against the action of counterweight 59, force connecting link 23 downward and r'otate'lever 25 about the .Qpivot 26, thereby causing the contact fingers 28 to be raised until ,they engage 'with the front contacts 31." At this timethe-countcrweight 59 will strikethe top of member 1 at 57, thereby preventing further motion, thecup v9 slipping on spindle 10 inorder to absorb its momentum. If the winding 7 of the relay is now deenergized the counterweight 59 will force the gear segment 18 backward thereby rotating cup' 9 backward and also moving link 23 u'pw d, and causing con tacts 28 to move dow'ri ixxi until they break their connection with cont cts 31 and make connection withcontacts 32 as shown in Figs. 1 and 2.-

Thus it will .be' seen that by keeping one set of windings continuously energized from a local source of a certain frequency, and by intermittently energizing. the other set of windings from a source of the same frequency but angularly displaced in phase, the relaymay be caused to open and close its front and back contacts at will, and thereby control local circuits to any desired cxtent.- a l While I have described'and shown one specific form of my invention, I do not wish to be limited to this specific means of construction, as it is obvious that a variety of different modes of construction may be employed without departing from the spirit of the invention.

Having described my invention, .what I claimas new and desire to secure by Letters Patent is: I

1.7 In combination in a relay, a ba mem- .ber' containing an alternating current motor, a'front member, an opening in the '-upper part of said front member to allow inspection of the operating mechanism, a cover for said opening,a forward extension. be-

low the opening in said front member adapted to carry an insulating panel, an insulating panel, contacts carried-by said insulatsaid front member, contact fingers carried by said bar in operative relat on to said contacts, nieans fortransmitting motion from the motor to the contact finger carrying bar to operate the contact fingers, and

a cover adapted to inclose said contacts and contact fingers.

'2. In combination in a relay, a back mem- V segment to return the same upon de'nergization ofthe operating mechanism, an opening panel, a contact finger bar carried by ing in the upper part of said front member to allow inspection of the operating mecha nism, a cover glass for said opening, a forward extension below the opening in said front member adapted tocarry an insulating panel, an insulating panel, contacts carried by said insulating panel, a contact finger carrying bar carried by said front memor, contacts carried by said bar in operative relation to said contacts, means for transmitting motion from said gear segment to said contact vfinger carrying barto operate the contact fingers, and a cover adapted to inclose the contacts andcontact fingers and engage with said forward extension.

3. In combination in a relay, a back member adapted to car an inner magnetic core, an outer stator inc osed in said member, op-

erating windings on said stator, a shaft, a

nonmagnetic rotor on said shaft in operative relation tosaid inner core and outer stator, a frictlon drive between said rotor and said shaft, a pinion on said shaft, a front member, a gear so ent pivoted in said front member and a apted to be operated by said pinion, a counterweight on said gear segment to return the sal ige upon deenergization of the operating echanism, an opening in the upper part of said front member to allow inspection of the operating mechanism,-a cover glass for said opening, a forward extension below the opening in said front member adapted to carry an insulating anel, an insulating panel, contacts carried y said insulating panel, a contact finger carrying bar carried by said front member,

contacts carried by said bar in operative relation to Said contacts, means for transmitting motion from said gear segment to said contact finger carrying bar to operate the eontacttingers,;and a cover adapted to inclose the -contacts and contact fingers and engage with saidforward extension; a

4. In combination in a relay, "a back mem:

erating w ndin s on said stator, a shaft, a

nonmagnetic rotor on said shaft in operative relation to said inner core andouter stator, a friction drive between said rotor and said shaft, afront, member, an opening in the upper part of-said fro t member to allow inspection of the operating mechanism, a coverfor said opening, a forward extension below the opening in said front member adapted to carry an insulating panel, an insulating panel, contacts carried by said insulating panel, a contact finger bar carried said front member, contact fingers earrled by said bar in operativerelation. to said contacts,

motor to the contact finger carrying bar to operate the contact fingers, and a cover adapted to inclcse said contacts and contact fingers.

5. In eombinationin a relay, a back member ada' ted to earr an inner ma etic core and an outer stator inelosed in said member, operating windings on said/stator, insulating panelsin said back m ber adapted to carry binding posts for the operating windlngs and to retain said outer stator in place,

a shaft, a nonmagnetic rotoron said shaft in operative relation to said inner core and outer stator, a friction drive between said rotor and saidshaft, a front member, a gear segment pivoted in said frontmember and adapted to be operated by said pinion, a counterweight on said gear segment to return the same upon denergization of the operatingmechanism, an opening in the upper part of said front member to allow inspectionof the operating mechanism, a" cover glass for said opening, a forward exmeans for transmitting motion:

carry an insulating panel,

onthe front and back tension below the opening in said front member adapted to panel, an insulating panel, contacts carried by said insulating panel, a contactfinger earryingbar carried by said front member, contacts carried by lation to said contacts, meansfor transmitting motion from said gear segment to said contact finger carrying bar to operate the contact fingers, and a cover adapted to inclose the contacts and contact fingers and engage with said forward extension' In combination in a relay, a back member adapted to carry an inner magnetic core, lugs formed on said back member for suspending the'relay, an outer stator inclosed in said back member, operating windings on said stator, insulating panels in said back member adapted to carry binding posts for the operating windings and to retain said outer stator in place, a shaft, a nonmagnetic rotor on said shaft in operative relation to said' inner core and outer stator, a friction drive between said rotor and said shaft, a front me1nber,an opening in the upper part of said front member to allow inspection of the operating mechanism, a cover for said opening, a forward extension below the opening in said front member adapted to an insulating panel, contacts carried by saidinsulating panel, a contact finger bar carried by said front member, contact fingers carried by said bar in operative relation 'to said contacts,

- means for transmitting motion from the m0- tor to the contact finger earl-yin bar to operate the contact fingers,

extensions formed members to form supporting feet, and a cover adapted to iriclose said contacts and contact fingers.

In testimony whereof, I have signed my name to this specification.

OSCAR S. FIELD.

carry an insulating said bar inoperative re- 

